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CPS2 Conversion

Ok guys, this is driving me crazy.
I had a dead MvC board and decided to convert the thing to a progear. Video is fine but all i get is some sound effects and about half of the music which is tinny and scratchy (including the Q sound jingle)

I've checked all jumpers with a multimeter and they check out fine.

Here's where it gets weird. This board had seals on it from capcom, a PALG chip in PAL3 but underneath it had a wire patched from pin 9 of the PAL to pin 13 of CN5

The board is a REV 4

Now I thought this was done by capcom to trick a board into thinking a PALF was a PALG so no idea why they would have had to do this.

I've tried the following:

Leave the patch wire in place, lift leg 7 and wired that to CN1 pin 13 (assuming the PALG chip was reflashed a PALF from capcom)

Leave the patch wire in place , lift leg 9 and wired that to CN1 pin 13

I've also done the same two things with the patch wire from underneath the board removed.

Ok guys, this is driving me crazy.
I had a dead MvC board and decided to convert the thing to a progear. Video is fine but all i get is some sound effects and about half of the music which is tinny and scratchy (including the Q sound jingle)

I've checked all jumpers with a multimeter and they check out fine.

Here's where it gets weird. This board had seals on it from capcom, a PALG chip in PAL3 but underneath it had a wire patched from pin 9 of the PAL to pin 13 of CN5

The board is a REV 4

Now I thought this was done by capcom to trick a board into thinking a PALF was a PALG so no idea why they would have had to do this.

I've tried the following:

Leave the patch wire in place, lift leg 7 and wired that to CN1 pin 13 (assuming the PALG chip was reflashed a PALF from capcom)

Leave the patch wire in place , lift leg 9 and wired that to CN1 pin 13

I've also done the same two things with the patch wire from underneath the board removed.

Any help would be appreciated.

Thanks

Try wiring leg 9 to CN3 pin 13 instead from the top of the board. I know it is supposed to be the same, but I had issues with doing leg 9 to CN1 pin 13 on the bottom of the board.